1、Malleable cast iron fittings with compression ends for polyethylene (PE) piping systems STD=BSI BS EN L0284-ENGL 2000 E Lb24bb7 0857744 Ab3 E BRITISH STANDARD The European Standard EN 10284:2000 has the status of a British Standard BS EN 10284:2000 ICs 23.040.40 NO COPYING WITHOUT BSI PERMISSION EXC
2、EPT AS PERMITTED BY COPRIGHT LAW STD-BSI BS EN 1028Li-ENGL 2OOO D Lb24bb7 08577115 7TT BS EN 102842000 Amd. No. National foreword Date Comments This British Standard is the officiai English language version of EN 10284:2000. The UK participation in its preparation was entrusted to Technical Committe
3、e ISE19, Ferrous pipe fittings (excluding cast iron), which has the responsibility to: - aid enquirers to understand the text; - present to the responsible European committee any enquiries on the - monitor related international and European developments and promulgate interpretation, or proposais fo
4、r change, and keep the UK interests informed; them in the UK A iist of organizations represented on this committee can be obtained on request to its secretary. Cross-references The British Standards which implement intemational or European publications referred to in this document may be found in th
5、e BSI Standards Catalogue under the section entitled kternatiord Standards Correspondence Index”, or by using the “Fnd” facility of the BSI Standards Elecronic Catalogue. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Stan Annex 6 (informa
6、tive): Quality assurance system; Bibliography. According to the CENICENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Irela
7、nd, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. O BSI 07-2000 STD=BSI BS EN 10284-ENGL 2000 m lb2Llbb 0857747 345 m Page 4 EN 10284:2000 Introduction In respect of potential adverse effects on the quality of water intended for human consumptio
8、n, caused by the products covered by this standard: 1) this standard provides no information as to whether the product may be used without restriction in any of the Member States of the EU or EFTA; 2) it should be noted that, while awaiting the adoption of verifiable European criteria, existing nati
9、onal regulations concerning the use and/or the characteristics of these products remain in force. O BSI 07-2000 STD.BSI BS EN 10284-ENGL 2000 Lb24bb9 0857750 Ob7 Page 5 EN 10284:2000 1 Scope This standard specifies the requirements for the design, performance and testing of fittings made of malleabl
10、e cast iron (see also clause 5 Materials) with compression ends for polyethylene piping systems. It applies to piping systems in polyethylene (PE) materials for different application fields, such as water and gas supply, water distribution, irrigation and gaseous fuel systems. The malleable cast iro
11、n fittings specified in this standard are of compression end type for the connection of PE pipes or of transition type with combined compression ends for pipes in different materials or with combined compression and threaded ends in conformance with prEN 10226-1. Their range of sizes covers nominal
12、outside diameters of PE pipes dn 16 to d, 125 mm and pipe thread sizes 1/2 to 4. 2 Normative references This European standard incorporates by dated or undated reference, provisions from other publications. These normative references are cited at the appropriate places in the text and the publicatio
13、ns are listed hereafter. For dated references, subsequent amendments to or revisions of any of publications apply to this European standard only when incorporated in it by amendment or revision. For undated references the latest edition of the publication referred to applies. EN 681 -1, Elastomeric
14、seals - Material requirements for pipe joint seals used in water and drainage applications - Part 1: Vulcanized rubber. prEN 682, Elastomeric seals - Material requirements for joint seals used in pipes and fittings carrying gas and hydrocarbon fluids. EN 751 -1, Sealing materials for metallic thread
15、ed joints in contact with Ist, 2nd and 3rd family gases and hot water - Part 1: Anaerobic jointing compounds. EN 751-2, Sealing materials for metallic threaded joints in contact with Ist, 2nd and 3rd family gases and hot water - Part 2: Non-hardening jointing compounds. EN 751-3, Sealing materials f
16、or metallic threaded joints in contact with Ist, 2nd and 3rd family gases and hot water - Part 3: Unsintered PTFE tapes. prEN 1555-1, Plastics piping systems for gaseous fuels supply - Polyethylene (PE) - Part 1: General. prEN 1555-2, Plastics piping systems for gaseous fuels supply - Polyethylene (
17、PE) - Part 2: Pipes. prEN 1555-5, Plastics piping systems for gaseous fuels supply - Polyethylene (PE) - Part 5: Fitness for purpose of the system. EN 1562, Founding - Malleable cast irons. prEN 10226-1, Pipe threads where pressure tight joints are made on the threads - Part 1: Taper external thread
18、s and parallel internal threads - Dimensions, tolerances and designation. prEN 10226-2, Pipe threads where pressure tight joints are made on the threads - Part 2: Taper external threads and taper internal threads - Dimensions, tolerances and designation. prEN 12201 -1, Plastics piping systems for wa
19、ter supply - Polyethylene (PE) - Part 1: General. O BSI 07-2000 Page 6 EN 10284:2000 prEN 12201 -2, Plastics piping systems for water supply - Polyethylene (PE) - Part2: Pipes. prEN 12201 -5, Plastics piping systems for water supply - Polyethylene (PE) - Part 5: Fitness for purpose of the system. EN
20、 1 0204, Metallic products: Types of inspection documents. IS0 228-1:1994, Pipe threads where pressure-tight joints are not made on the threads - Part I: Designation, dimensions and tolerances. IS0 10838-1 l) ,Mechanical fittings for polyethylene piping systems for the supply of gaseous fuels - Part
21、 I: Metal fittings for pipes of nominal outside diameter less than or equal to 63 mm. IS0 1 0838-21), Mechanical fittings for polyethylene piping systems for the supply of gaseous fuels - Part 2: Metal fittings for pipes of nominal outside diameter greater than 63 mm. 3 Types of fittings For types o
22、f fittings, see typical examples of design in Annex A (informative). 4 Definitions For the purpose of this standard the following definitions apply. 4.1 fitting connecting piece for pipes 4.2 transition fitting a fitting jointing different types of pipe and/or comprising different types of outlet 4.
23、3 fitting size size designation of the nominal outside diameter, dn, of the connecting PE pipe or of the size of the jointing thread 4.4 outlet end of a fitting which connects with a pipe by compression or with a threaded piping component 4.5 run two principal axially aligned outlets of a tee 4.6 br
24、anch side outlet of a tee 1) To be published. O BSI 07-2000 STD-BSI BS EN LUZB4-ENGL 2000 M Lb24bb 0857752 93T Page 7 EN 10284:2000 4.7 compression end an end of a fitting in which the joint is made by the compression of a ring or sleeve on the pipe to provide for pressure integrity, leaktightness a
25、nd resistance to end loads 4.8 supporting sleeve (insert stiffener) cylindrical ring providing a permanent support for the pipe to prevent creep in the pipe radial compressive forces the wall of wall under 4.9 grip ring ring that holds the pipes in place and prevents pull out from the joint NOTE In
26、some cases, the supporting sleeve at the same time constitutes a grip ring. 4.10 mini mum bore smallest internal diameter measured at any cross-section of the assembled fitting 4.1 1 jointing thread thread complying with prEN 10226-1 or prEN 10226-2 4.12 fastening thread thread complying with IS0 22
27、8-1 :1994 4.1 3 component test test to verify the performance of a fitting carried out on the fitting with or without the internal parts 4.14 jointing test test to verify the fitness for purpose of an assembled joint, including the fitting with the connecting pipes 5 Materials 5.1 Material of the fi
28、tting body 5.1.1 Malleable cast iron The material used for the fitting body shall be malleable cast iron conforming to EN 1562. The grade of material used shall be selected from the following grades: Grade EN-GJMW-400-5 or EN-GJMW-350-4 for fittings in white heart malleable iron. Grade EN-GJMB-350-1
29、 O or EN-GJMB-300-6 for fittings in black heart malleable iron. Fittings shall be designated by material symbols according to the selected material mentioned above and as given in Table 1. O BSI 07-2000 STD-BSI BS EN L028Li-ENGL 2000 Lb29bb9 0857753 87b B Page 8 EN 10284:2000 EN-GJMW-350-4 or EN-GJM
30、B-300-6 Table 1 - Material symbols 1 Material symbol I Material grade I A I EN-GJMW-400-5 or EN-GJMB-350-10 5.1.2 Other ferrous materials Notwithstanding this requirement, any other ferrous materials, e.g. ductile cast iron, which give mechanical properties at least equivalent to those malleable cas
31、t irons specified above will be allowed. 5.2 Material of the fitting components Materials of the internal parts of the fittings in contact with PE pipe shall not adversely affect pipe performance, e.g. by initiation of stress cracking. If a lubricant (detergent, grease, etc) is used for assembling i
32、t shall have no detrimental effect on the properties of the pipe and shall not cause the assembly to fail the functional requirements. 5.3 Elastomers The material of elastomeric sealing rings used in fittings shall be chosen for drinking water application from EN 681 -1 and for gas supply from prEN
33、682 depending on the specific application and shall conform to the appropriate class respectively type. 6 Corrosion protection 6.1 General In applications where materials are susceptible to corrosion, the components shall be adequately protected. 6.2 Hot dip galvanizing Where a protection by zinc co
34、ating is required, the zinc coating shall be applied by the hot dip process and shall meet the following requirements. NOTE by agreement with the purchaser. For fittings supplied in other ferrous materials (see 5.1.2) alternative zinc coating may be provided 6.2.1 Chemical composition of the zinc co
35、ating The content by mass of the accompanying elements in the finished zinc coating shall not exceed the following maximum values: antimony (Sb) 0,Ol % arsenic (As) 0,02 Yo bismuth (Bi) 0,Ol Yo O BSI 07-2000 Page 9 EN 10284:2000 cad mi um (Cd) 0,Ol Yo lead (Pb) 1,6 % in individual cases 1,8 Yo 6.2.2
36、 Coating mass per surface unit The areic mass of the zinc coating shall be not less than 500 um2, as an average of 5 fittings. This corresponds to a medium layer thickness of 70 pm. It shall be not less than 450 g/m2 (63 pm) when it is measured on an individual sample. The medium layer thickness ;of
37、 the zinc coating in pm may be calculated by using the approximation formula where mA is the surface related mass of the zinc coating, in g/m2. 6.2.3 Surface conditions of the zinc coating The zinc coating on the internal surface of the fitting shall be continuous with the exception of machined surf
38、aces. In the special case of larger material cross-sections the iron-zinc alloy phases may grow through. The internal zinc coating shall be free from zinc blisters, zinc burrs, non- metallic remainders. 6.3 Non-metallic coating Depending on external and internal conditions of use, also non-metallic
39、coating may be used, for example plastic coatings, if they are accepted by the purchaser. 6.4 Dispatch conditions of finished fittings The surface of the fittings shall be free of polycyclic aromatic hydrocarbons. 7 Design 7.1 General The fitting shall be capable of field assembly to PE pipes comply
40、ing with - prEN 12201 -2 for drinking water distribution; and/or - prEN 1555-2 for gas supply. If special mechanical assembly tools are required, they shall be made available and they shall have sufficiently large bearing surfaces to avoid causing visible deformation during assembly. The fitting and
41、 tools shall be designed to avoid any weakening which would influence the performance of the joint assembly. O BSI 07-2000 Page 10 EN 10284:2000 The fitting shall be so designed and manufactured that it can be buried or used above ground. The fitting shall not induce twisting of the PE pipe during a
42、ssembly. Transition fittings shall include, if requested, means for anchoring an antishear sleeve, which could lessen detrimental effects from shear loading. Examples of design are shown in Annex A. 7.2 Geometrical characteristics Fittings according to this standard shall be designed for PE pipe dia
43、meters and jointing threads as follows: - nominal outside diameter, , of PE pipes: 16, 20, 25, 32, 40, 50, 63, 75, 90, 110, 125 mm; - size of jointing threads: YZ, %, 1, l%, lYZ, 2, 2%, 3, 4. 7.3 Supporting sleeve The outside diameter of the internal supporting sleeve (insert stiffener) shall be suc
44、h to comply with the internal diameter of the connecting PE pipe. Where the clamping of the tube end is made by expending the supporting sleeve or by using a taper sleeve (insert stiffener), the tube end may be sized up. For gas supply a rigid supporting sleeve other than a split tubular stiffener s
45、hall be used in conjunction with the fitting. For other application than gas supply the use of a supporting sleeve is left to the discretion of the manufacturer, depending on design. The Supporting sleeve shall be capable of insertion into the appropriate PE pipe without heating, except to an extent
46、 appropriate to rerounding of the pipe at a temperature below -5 OC. Except for pre-assembled fittings, this sleeve shall be provided with a stop to control its position in the pipe. The supporting sleeve shall provide support over the entire compression area and there shall be no longitudinal displ
47、acement of the sleeve after assembly. If a sleeve is required, the fitting shall have only one supporting sleeve per pipe size covering the complete tolerance range of the relevant PE pipe. 7.4 Minimum bore The minimum bore is given by the manufacturer. 7.5 Pipe threads Jointing threads on transitio
48、n fittings shall be in accordance with prEN 10226-1 or prEN 10226-2. Fastening threads of outlets shall be in accordance with IS0 228-1 :1994. O BSI 07-2000 STD-BSI BS EN 1028V-ENGL 2000 Lb24bb7 085775b 585 Page 11 EN 10284:2000 NOTE Mating threads on pre-assembled components are left to the discret
49、ion of the manufacturer. Threaded parts shall be made in metal. No jointing threads shall be cut on PE pipes. 7.6 Appearance The sealing surfaces shall be free of all scratches, blisters or cracks that might affect the leaktightness of the assembled joint. Those contact surfaces that are rendered leaktight by means of an elastomeric seal shall be smooth. No component of the fitting shall show any signs of damage, scratches, pitting, bubbles, blisters, inclusions or cracks to an extent that would prevent compliance with this standard. They shall not be impregnated t
